Rounding machine



A. R.. SCHOENKY. ROUNDING MACHINE.

APPLICATION FILED Aue.2s. 191's.

Patented Se t 5, 1922.

4 SHEETSSHEET l.

A. R. SCHOENKY.

ROUND|NG MACHINE.

APPLICATION FILED Aue.28,1919.

Patented Sept. 5, 1922.

'1 SHEETS-$HEET 2.

A. R. SCHOENKY. ROUNDING MACHINE. APPLICATION FILED AUG.28, 1919.

Patented Sept. 5, 1922.

' A. R- SCHOENKY.

,ROUNDING MACHINE. -APPLICATION man 16.28. 19 19.

1,428,261 I PatentedSept. 5, 1922.

4 SHEETS-SHEET 4.

Patented Sept. 5, 1922.

AUGUST 1a. SCHOENKY, or SOMERVILLE, rlrnsseorrnsnrtrs, ssrenoia To Renoir.

SHOE MACHINERY COMPANY, OF BOSTQN,

OF MAINE.

MASSACHUSETTS, A CORPORATION ROUNDING MACHINE.

Application filed au ment, 1919. Serial No. 320,382.

To all whom it may concern:

Beit known that I, AUeUsr B. SoHonNKY, a citizen of the United States, residing at Somerville, in the county of Middlesex and State of Massachusetts, have invented a new and useful Rounding Machine, of which the following is a specification, reference being had therein to the accompanying drawing.

Rounding machines, used in the manufac ture of boots or shoes, are employed for preliminarily trimming or rounding the extending edges of the soles preparatory to the final sole stitching operation. F or example, with a welt shoe the outsole may be temporarily attached to the connected insole, welt, and upper, while the latter is occupied by the wooden last, and at this stage the trimming or rounding of the outward extension, consisting of outsole and welt, to the approximate or final contour, is performed on the rounding machine. while the present invention may be applied to various types or classes of rounding machine, I select for illustration that shown in my prior Patents, No. 1,040,433 of October 8, 1912, and No. 1,243,228 of October16, 1917. In the class of rounder shown in said patents, certain principal elements or instruments are shown which are substantially duplicated in the present illustration of my invention, and a recital of which will establish the characteristics of the illustrative class of rounding machine. The rounding or trimming is performed by a cutter C, this being a constantly pressed forcibly but yieldingly forward. against the work and is usually retractable rearwardly by a pedal to permit the insertion or removal of the work. The opposed .or front work clamping or feed ng member D 1s given a movement to and from the work for. clamping and unclainping it against the rotatable clamp or work rest B. The 60.0 erating clamping members B and D have combined movement along the lme of feed,

that is, transversely,so as to permit the a motion movement described. Usually the cutter vibrates forwardly and 'backwardly' and the work'is fed transversely or horizontally, for example, leftwardly through the path of the cutter. The work is held up in position by the operative, who is able to observe the progress of the rounding. Work guiding means is employed in the form of one or more guides above the path of the work, so that the operative-is not required to use h1s judgment but merely holds the work firmlyup against theguide as it feeds and s trlmmed. The work is frequently guided 1n two waysand by two separate guides, either of which may be put into effect. In

trimming along the shanks of ashoe, it is is shown adapted to contact the shoe upper outside the wooden last. The crease guidev being stationary, the last guide will be shiftable from an, elevated inoperative position to a lowered operative position, in which latter it engages the shoe and depresses it so as to assume the guiding function which is thus taken from the crease guide; Other instruments may'be'used. For example, the prior patents show a knife H for cutting a channel at the under side of the outsole to facilitate the subsequent outso-le stitching.

This channeling knife moves with the work,

clamping, or feeding devices, 1 advancing with the shoe andoperatingzon the return stroke while the shoe is stationary. A welt guttering tool G, moved into position when the last'guide is in operation, serves to form a slight depression or gutter at the top. the welt opposite the channel in the outs ole to receive. the visible portion of the stitches around the fore part of the shoe.

The main object ofthe present invention is to afford an improved mechanism for causing the width of the extending'edge ofthe sole to be varied around the contour of the shoe, The expired p atent-of French & Meyer, No. 630,339, patented August 8, 1899, shows a cam mechanism for this purpose, and'inv part this invention is an improvementthereover. The cutter or the work guide, preferably the latter, is fitted in such manner as to enable the position or relation of the two to be varied during the rounding operation. This may be applied to any kind of work guide; the width of the extension may be which works automatically and varies in predetermined manner the relation between the work guide and cutter; specifically, it varies the height of the wor: guide and, therefore, the path of the shoe relatively to the path of the vibrating cutter.

A further object is to render the shape.

control, stated in the preceding paragraph, adaptable or adjustable for different sizes of shoes. Where the feed and cut length are not proportioned to the size of the shoe, the number of cuts or cycles will be greater with a large than a small shoe. The controller or cam if set for one size would not give a corresponding control for another size, unless adjusted. This object is accomplished herein by providing a control or cam mechanism which has its action or progress adjustable at will so that it may be initially set to correspond to the size or contour-length of the shoe being rounded. Specifically I herein show slow moving control cam, the rate of advance of which is adjusted, being rendered more rapid for small and more slow for large shoes, proportionately, so that precisely the predetermined shape or style will be correspondingly produced on all sizes of shoes.

A further object is to enable the shape control to be reversed in action, so that the operative may first round a right shoe and.

then a left shoe. This is advantageous in order that shoes may be. manufactured in pairs. If the rounding of the right shoe is begun at the outside shank, the rounding of the left shoe will be begun at the inside shank, and this reversibility of control will insure both shoes having precisely corresponding shape. This object is herein attained by providing that the controller or cam is actually reversible in its action or progress, Specifically it is herein shown automatically reversed so that it travels in one direction for the one shoe and in the reverse direction for the succeeding shoe. lt advances to the end of its travel and on the next rounding operation starts back over the same course.

Further objects are to improve and render more convenient and efiicient the rounding machine, in various respects, especially to render complete and practical each of the previously above recited features, and to adapt them more especially to the particular class of rounding machine shown in the prior patents mentioned. These objects are attained by the features of combina tion, arrangement, mechanism and detail herein illustrated, described or claimed.

In the accompanying drawings, Figure l is a front elevation of a rounding machine, which for illustrative purposes is of the class shown in said prior patents, embodving the several features of the present invention.

Figure 2 is a left elevation of said machine, the last guide F being in elevated or inoperative position.

Figure 3 is similar to Figure 2 with, however, the last guide in its operative position.

Figure 4 is a left elevation of the ecceutrio and adjusting devices for altering the speed of the controlling slow cam, shown partly in section on the line 4, i of Figure 5.

Figure 5 is a central section on the line 5, 5 of Figure 4;.

Figure 6 is a face view of the controller cam.

Figure 7 shows the trimmed shoe, diagrammatically marked to indicate the op erations performed.

Figure 8 shows the shoe in cross section before the trimming or rounding operation.

It is not deemed necessary to describe in detail the various features which are already made clear in the prior patents. The parts having to do with the objects and features of the present invention will now be described.

At the top of a vertical. post 9 is the machine head 10. Control pedal or pedals may be at the base of the post. The main or power shaft 11' extends horizontally and transversely through. the head. From left to right, themaiin shaft carries the following elements. The belt pulley 19, is at the left extremity. An eccentric 13 is shown which causes the advance, in a step-by-step manner, of the slow cam or controller to be described. The shaft is next formed with a first crank and a second crank 15, and beyond that is a shaft cam 16. 'The use of the two cranks is in accordance with my prior Patent 1,243,228, in which is explained how, with the use of these cranlts and the link and. lever mechanism operated thereby, a machine of greater smoothness,

quietness and speed is attained. The first crank serves to give the feeding movements to the work feeding devices. The crank 15 operates the cutter C. The cam 16 moves the front clamp or work feedmember D to and from the work. j i

The present invention has particularly with the last guide .F. Already I have mentioned its movements between .the upper or inoperative, and lower orjoperative positions; and when in its'operative position it has slight variations of position relatively to the pathof thecutter so as to vary the'extension or width of the out standing shoe sole. A convenient way to fit the last guide for such movementsand adjustments is through a carrying arm 20 which swings with its carrying shaft 21, somewhat as in the prior patents. 1 Mounted on the short shaft 21 is arearwardly extending arm 22 provided with an upwardly .trollershaft'50 and the camfll05 may be regulated in accordance with this. invendirected forked end 23. The carrier or arm 20 is constantly acted upon by a spring 24 tending to raise it to inoperative position,

The last guide and carrier may be pulled down against resistance ofspring 24 by any Suitable automatic or nonautomatic means, such as the pedal connection 27 extending to a convenient pedal which may be depressed at will to bring the guide down to its operative position. The means for limiting, varying and controlling the downward 0r operative position of the guide by slow moving cam 105 will be later explained.

The slow traveling controller or cam 105 which dominates the operation of the present invention, may be advanced in a step by-step manner by the action of the eccentric 13 of the main shaft 11, by the following I connections. The eccentric is surrounded by the usual ring or strap 31, the armor rod 32 of which extends upwardly to where it bears laterally against a fixed frame part 33. This frame part has a somewhat elongated guiding slot or recess 34 to receive a roller '35 ,mounted on the eccen-.

tric rod. This permits the up-and-down rod movements, and is also sufficiently wide to permit the rod to swing slightly forwardly and rearwardly. A spring 37 constantly pulls the eccentric rod forwardly to the position illustrated in Fig. 3, away from the rear side of slot 34.

The up-and-down eccentric rod movements operate through a pawl-38 mounted on it to advance slowly and step-by-step a toothed wheel 40. It will be perceived that this causes a slow clockwise travel of the disk or ratchet wheel and, as will be explained, this drives the control cam 105 in the proper direction for rounding a right shoe. At this point I also mention that a second or upper pawl 39 is provided on the eccentric rod, this co-operating with a second toothed disk or ratchet wheel 41 for the purpose of driving counterclockwise during the rounding of the left shoe. It is intended that one or the other of the pawls 38 and 39 they will be thrown out: of operation The v f two pawls; areiaccommodated in a recess to do moreformed in the eccentric rod and areprovided with outstandlngpins or studs 42 and *43, respectively, through whichthey or either of;them.may, be thrown awaylfrom the-toothed disk to render the same inoperativea- The pawls areshown springpressedvtoward operative position. i

The two toothed; disks,40,'i 41, through which the eccentric movements secure con 1 troller action in one drection orv the aother,v

are keyed to a cross shaft 50which maybe termed a controller shaft or cam shaft, as

it carries or drives the.;slow, moving control cam 105.- l

The speedaof action or travel of the coni 1 tion, for; the purpose of adapting. the. machine toshoes of. varying sizes, by-suitable mechanism such as the following.

of the eccentric I13. The power'shaft 11 is This-v preferably operates by changing the throw.v

shown/as having flattened side portions 53 r for engaging the corresponding sides of a recess 54 formed in the eccentric. fittings enable the eccentric to y be radially shiftedto changefits throw. Thechange: may be effected andthe eccentric heldin any adjustment through a pair 'of radial These pins 55, '55 extending inwardly from the eccentric through holes in the shaft. The shaft atthisipointi is hollow, and within it is provided a cam 57 secured attheend of a sliding rod 58 .movableax'iallywithin the i hollow of the shaft, and compelled to turn with the shaft by a stud 59 passing through the shaft wall and engaging a keyway in Axial movements of the rod;

the rod 58. cause the cam 57 to act upon the rods 55 and shift the eccentric radially to afford the I desired eccentricity.-

Such adj ustment may be: effected I through a grooved collar 60 at the extreme or left extremity of the interior rod 58. This collarw60 is shown engaged by a yoked arm 61 fulcrumed, at 62'and having an operating extension 163. A right-threaded rod 64 is pivoted to theextension ,63, and in linewith it is a left-threaded rod 65 pivoted to a frame. art. A wheel'or nut 67 properly interiorly threaded,engages both the thr'eada number of peripheral teeth or notches, cor- Y responding roughly with 'the number of shoe sizes to be rounded, and on each of these teeth ismarked an indication of the size of the shoe to be roundedwhen the wheel is set with such marking opposite an opening or window in a bracket 68.

A. tensioned coil spring 69 returns the adjusting wheel 67 always to its extreme or zero position when released, and serves to maintain it in proper position, engaging the following described setting means.

A collar 71 is mounted loosely on the wheel 67, and from this collar extends forwardly a handle .72 within convenient access. A pawl 73 is connected to the handle and is spring-pressed into engagement with the peripheral teeth of the wheel. The handle 72 may be moved up-and-down between upper and lower stops 74: and 7 5.

A spring 76 lifts it to its highest position, l/Vhen the handle is depressed, it throws downward the front side of the wheel. The wheel may there be held by asupplemental pawl 77 pivoted to permit its removalfromv operative position. l/Vhen the handle rises, the pawl 73 passes over one tooth of the wheel. In this way the operator may readily shift the wheel to bring about the desired adjustment, according to the size of the shoe to be rounded. On the handle is shown an unlatching lever 79 which, when pressed, withdraws the pawl 73'. By lifting at the same time the pawl 77, the spring 69 will rotate the index wheel 67 to its zero orextreme position. 7

Rather than have the operative efi'ect a manual adjustment to reverse the direction of travel of the controller 105 for right and left shoes, alternately, this is herein performed automatically, for example by the fol'lowingmechanism. Mounted loosely on the controller shaft 50 is a pawl-changing disk or cam 81. This has alternate elevations 82 and recesses 83 around its periphery. These co-operate with the studs 42 and 13 on the pawls 38 and 39. The studs and the elevations on the disks are so spaced that, while an elevation holds one pawl retracted, the stud of the other pawl is in the recess beneath the elevations, rendering its pawl operative. Thus, in Fig. 3 the lower pawl is operative, while the upper one is held away from its toothed disk.

In order to automatically shift the pawl changing disk 81 after each rounding operation, I have shown, connected to the disk, a toothed wheel 85 having one tooth for each elevation and one for each depression on the disk. The wheel 85 is acted upon by a spring-lifted pawl 86 which is mounted on a long rearwardly-extending slide bar 87 having a stud 88 engaging in the fork 23 of the arm 22 which swings with the last guide carrier 20. The result is that when the last guide has performed its service on each shoe and rises, this shifts the pawlchanging disk, as described.

The advance of shaft 50 and the controller 105 thereon may be caused to cease or suspend while the last guide is inactive. To give this result the slide bar 87 is provided with a cam 89, which, as the guide rises, depresses the rear arm 90 of a bell crank the upward arm 91 of which is connected by link 92 to the upper end of the eccentric rod 32, so that the rod "and its or timing of these parts.

The last guide'carrier arm 20 is shown as having an upward extension 100. In the prior patents the upper extremity of this was formed as a stop which came forwardly with the descent of the guide and met a fixed abutment or stop, giving the guide always the sameuniform operative position. In

the present machine, the upward extension or stop member 100 is formed with an e11- larged head 101 interiorly engaged by the threaded stop bolt 102' which is therefore adjustable in position, and is secured in any adjustment by lock nuts 103. The forward end of the stop bolt 102 is provided with a cam roll 104, and this engages directly against the slow moving controller or cam 105 which is mounted on, so as to rotate with, the controller shaft 50.

By this arrangement, the forward swing of the head 101, and therefore the downward swing of the guide, is limited or controlled according to the contour of the-cam. When the shoe is being guided by the last, the roller 10 1 rides on the cam 105. Slight elevations in the cam will slightly lift the guide and therefore slightly lift the shoe, and produce a narrower sole extension at that point. Depressions in the cam produce greater width in the extension. In order, therefore, to slightly vary the height of the guide, that is, its relation to the path of the cutter, during a rounding operation, to secure any desired contour of shoe sole, it is only necessary to correspondingly form the a contour of the controller or cam 105.

The controller is shown in Figs. 2-, 3 and 6 as having such contour asto produce a shoe substantially such as is shown in Fig. 7.

The diagram numbers from 1 to 20, and 21 correspond with 1, indicate the cam contour and its effect. At each point-the sole extension corresponds with the cam radius.

It will thus be seen that I have described a rounding machine embodying the principles and attaining the advantages of the present invention. Obviously, many matters of combination, arrangement, structure,

mechanism, and detail, may be variously modified without departing from the underlying principles, and therefore it is not mtended to limit the invention to such matters except in so far as specified in the appended claims.

WVhat is claimed is:

1. A shoe rounding machine comprising means for feeding the work, a trimming cutter and a guide against which the shoe contacts during operation, the elements, cutter and guide being relatively adjustable during operation to vary the width of the sole extension around the shoe, characterized by a controller, a pawl and ratchet for advancing the controller, a vibrating arm carrying the pawl, and connections actuated by the retraction of the guide for shifting the pawl carrying arm from the ratchet and thereby rendering the pawl inoperative.

2. A shoe rounding machine comprising means for feeding the work, a trimming cutter and a guide against which the shoe contacts during operation, the elements, cutter and guide being relatively adjustable during operation to vary the width of the sole extension around the shoe, characterized by a controller 105 progressively shiftable to vary the position of one of said elements, the same at its travel end being reversible in direction to change for ri 'ht or left shoes, a pawl and ratchet device or advancing the controller having two pawls acting in opposite directions, a pawl control cam actuated by the guides retraction after one shoe is completed and operating to throw one pawl out of action and the other into action, and pawl vibrating means.

In testimony whereof, I have afiixed my signature hereto.

AUGUST R. SOHOENKY. 

